Geir Pedersen

An investigation of the prototype validity of the borderline DSM-IV construct

Objective:  To investigate the prototype validity of the borderline personality disorder (BPD) DSM‐IV construct.

Is SCL-90R helpful for the clinician in assessing DSM-IV symptom disorders?

Objective:  To investigate associations between six of the Symptom Check‐List 90R (SCL‐90R) subscales and specific DSM‐IV symptom disorders in a sample of patients with high comorbidity of axis I and axis II disorders.

The symptom and function dimensions of the Global Assessment of Functioning (GAF) scale

OBJECTIVE The objective was to investigate the validity and clinical impact of the symptom and function dimensions of the Global Assessment of Functioning (GAF) in the Diagnostic and Statistical Manual of Mental Disorders (DSM), Fourth Edition. Is there any need for revision with respect to the DSM, Fifth Edition? MATERIAL The sample comprised 2695 patients consecutively admitted to 14 different treatment units participating in the Norwegian Network of Personality-Focused Treatment Programs from 1998 to 2007. METHODS Convergent and discriminant validity of the symptom and function dimensions of GAF was analyzed by their associations with demographic variables, diagnostic status, and other self-reported variables assessing symptom distress, interpersonal problems, work and social impairment, and quality of life. RESULTS The validity of the separate GAF dimensions was confirmed by discriminant and concurrent associations to other relevant clinical measures. However, the traditional GAF measure based on the lower score of either symptom or function level was found to serve well as a global indicator of symptom distress and social dysfunction. A substantial difference between the symptom and function score of GAF was found in about 10% of the cases; and when differences were found, functional impairment was most often more severe. CONCLUSION This study confirms the validity of the 2 GAF dimensions. However, substantial differences between these dimensions are rarely occurring. We therefore recommend that the GAF scale be prolonged in the DSM, Fifth Edition, roughly in the same shape as in the DSM, Fourth Edition.

The quality of the DSM-IV obsessive-compulsive personality disorder construct as a prototype category.

The study evaluated the quality of the DSM-IV obsessive-compulsive personality disorder (OCPD) construct as a prototype category. A sample of 2237 patients from the Norwegian Network of Psychotherapeutic Day Hospitals was examined by a variety of psychometric analyses. A high number of OCPD patients (77%) had co-occurrent PDs, but only the co-occurrence with paranoid was significantly higher than expected. Exploratory factor analysis of the PD criteria indicated that OCPD consists of 2 dimensions. The first dimension, perfectionism, was constituted by OCPD criteria only and was significantly related to obsessive-compulsive disorder. The second dimension, aggressiveness, included 2 OCPD criteria, reluctance to delegate and stubbornness, but was also defined by criteria from paranoid, antisocial, and borderline PD. Confirmatory factor analysis of the OCPD criteria indicated a poor fit of both a unitary model and a 3-dimensional model. Overall, the OCPD criteria had poor psychometric properties. Although it seems that the quality of the DSM-IV OCPD as a prototype construct is insufficient, it may be improved by deleting the criteria hoarding behavior and miserliness. Alternative criteria could be related to problems in close relationships involving the need for predictability. Such revisions may add a third dimension to the 2 dimensions of perfectionism and aggressiveness.

A study of the dimensionality and measurement precision of the SCL-90-R using item response theory

We used item response theory (IRT) to (a) investigate the dimensionality of the Symptom Checklist‐90‐Revised (SCL‐90‐R) in a severely disturbed patient group, (b) improve the subscales in a meaningful way and (c) investigate the measurement precision of the improved scales. The total sample comprised 3078 patients (72% women, mean age = 35 ± 9) admitted to 14 different day hospitals participating in the Norwegian Network of Personality‐focused Treatment Programmes. Mokken Scale Analysis was used to investigate the dimensionality of the SCL‐90‐R and improve the subscales. This analysis was theory‐driven: the scales were built on two start items that reflected the content of the disorder that corresponds with the specific scale. The Graded Response Model was employed to determine measurement precision. Our theory‐driven IRT approach resulted in a new seven‐factor solution including 60 of the 90 items clustered in seven scales: depression, agoraphobia, physical complaints, obsessive‐compulsive, hostility (unchanged), distrust and psychoticism. Most of the new scales discriminated reliably between patients with moderately low scores to moderately high scores. In conclusion, we found support for the multidimensionality of the SCL‐90‐R in a large sample of severely disturbed patients. Copyright

A study of patients with personality disorder not otherwise specified.

BACKGROUND Personality disorder not otherwise specified (PD NOS) is a frequently applied diagnosis, but we lack knowledge of the clinical appearance of patients receiving the diagnosis. This study applied a large clinical sample (N = 1516) to investigate (1) the prevalence and diagnostic and clinical characteristics of patients with PD NOS defined according to Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) and (2) the prevalence and psychosocial impairment associated with different definitions of PD NOS. METHOD Patients from the Norwegian Network of Psychotherapeutic Day Hospitals diagnosed in accordance with the LEAD standard (Longitudinal, Expert, All Data) were evaluated on several clinical measures at admission and discharge from short-term treatment. RESULTS The DSM-IV PD NOS category was the third most frequent PD diagnosis. Seventeen percent of the total sample and 22% of those with PDs had a PD NOS diagnosis, with an average of 9 PD criteria. Patients with PD NOS were heterogeneous with respect to types of PD criteria, 41% were not subthreshold on any specific PD. The PD NOS patients were intermediate between patients with specific PDs and those with no PD regarding number of fulfilled PD criteria and several social and clinical variables. Alternative operationalizations of PD NOS, that is, subthreshold on at least 2 specific PDs or meeting a minimum of 10 PD criteria, resulted in lower prevalence rates and defined clinically more impaired patients. CONCLUSION The PD NOS defined according to DSM-IV has a high prevalence and seems to capture a group of patients with fewer PD criteria and less severe psychosocial impairment compared to patients with specific PDs. The findings indicate that the operational definition of PD NOS may have a strong impact on the prevalence and clinical appearance of patient receiving this diagnosis.

The impact of avoidant personality disorder on psychosocial impairment is substantial

Few studies have compared the psychosocial problems associated with different types of personality disorders (PDs). The aim of this study was to investigate the functional impairment and symptomatic distress associated with six PD diagnoses coded in DSM-IV: paranoid, borderline, avoidant, dependent, obsessive–compulsive PD and PD not otherwise specified, as well as a condition of non-psychotic symptom disorders with no PD. The study included 1023 patients from eight day treatment units specialized in the treatment of PDs. Eighty-one per cent had one or more PD diagnoses. At admission to day treatment, the patients were evaluated with respect to global functioning, symptomatic and interpersonal distress, education, quality of life, social support, legal problems and previous psychotic episodes and psychiatric hospitalizations. There were few differences in global functioning or symptomatic and interpersonal distress between patients with a single PD diagnosis. Avoidant PD and borderline PD was the diagnoses that contributed most to dysfunction in most variables when taking into account the presences of several co-occurrent PD diagnoses and axis I disorders. The psychosocial problems associated with avoidant and borderline PD were partly domain specific. The study indicates that avoidant PD is associated with severe dysfunction and subjective distress, at a level comparable to that of borderline PD. Avoidant PD deserves more attention, both with respect to the specific psychopathology and dynamics underlying the disorder and the development of treatment approaches.

Specific personality traits evoke different countertransference reactions: an empirical study.

The main aim of this study was to examine the relationship between patients’ self-reported personality characteristics, treatment outcome and therapists’ countertransference reactions. Eleven therapists filled in the Feeling Word Checklist 58 (FWC-58) for each patient admitted to a day treatment program. The patients completed the Circumplex of Interpersonal Problems (CIP) at admission and discharge. Outcome measures were assessed at the end of treatment. At the start of treatment, therapists reported fewer feelings of rejection and being on guard in response to patients who reported high avoidant, exploitable, overly nurturing and intrusive CIP subscale traits. At the end of the treatment, the CIP subscales of being domineering, vindictive and cold correlated with fewer positive and more negative countertransference feelings. The study revealed a strong relationship between improvement and countertransference feelings. This study confirms clinical narratives on relationships between the therapists’ countertransference reactions and patients’ reported interpersonal problems and outcome.

The MBT Adherence and Competence Scale (MBT-ACS): Development, structure and reliability

Abstract The properties of the 17-item Mentalization-Based Treatment Adherence and Competence Scale (MBT-ACS) were investigated in a reliability study in which 18 psychotherapy sessions, comprising two sessions by nine different therapists, were rated by seven different raters. The overall reliabilities for adherence and competence for seven raters were high, .84 and .88 respectively. The level of reliability declined by number of raters but was still acceptable for two raters (.60 and .68). The reliabilities for the various items differed. The MBT-ACS was found to be an appropriate rating measure for treatment fidelity and useful for the purposes of quality control and supervision. The reliability may be enhanced by redefining some items and reducing their numbers.

Psychometric properties of the Affective Lability Scale (54 and 18-item version) in patients with bipolar disorder, first-degree relatives, and healthy controls

INTRODUCTION The aim of this study was to investigate the psychometric properties of the original 54 item version (ALS-54) and the short 18 item version (ALS-18) of the Affective Lability Scale (ALS) in patients with bipolar disorders, their first-degree relatives and healthy controls. Internal Consistency and Confirmatory Factor Analysis were performed, comparing clinical and non-clinical group comparisons on ALS scores. METHODS A total of 993 participants (patients with bipolar disorders [n=422], first-degree relatives [n=201] and controls [n=370]) were recruited from France and Norway. Diagnosis and clinical characteristics were assessed using the Structured Clinical Interview for DSM-IV Axis I disorders (SCID-I), or the Diagnostic Interview for Genetic Studies (DIGS). Affective lability was measured using the ALS-54 and ALS-18. RESULTS Both ALS-54 and ALS-18 showed high internal consistency, but the subdimensions of both versions were highly inter-correlated. From confirmatory factor analysis both versions revealed acceptable to good model fit. Patients had significantly higher ALS scores compared to controls, with affected first-degree relatives presenting intermediate scores. CONCLUSION Both the original ALS-54 version and the short ALS-18 version showed good psychometric properties. They also discriminated between patients with a bipolar disorder (high ALS), first degree relatives (intermediate ALS), and healthy controls (low ALS). A high correlation between ALS items for both versions was observed. Our study supports reducing the scale from 54 to 18 items.